Philosophy homework help

I have done this problem with different numbers multiple times and kept getting it wrong. I am wondering if you can check my work and tell me if/where I went wrong? 1- 0.22662735238 = 0.773372647620.77337264762 – 0.1907 = 0.58267264762z (0.58267264762)= -0.21 ANSWER

 
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